This clearly follows up to a situation where the registries are full of un-wanted entries. In fact it might not be wrong to say that everything you do in your system is recorded here including the myriad of links you have opened.
The settings for the software programs you install, user preferences, hardware devices settings, OS configuration, etc is also stored here. It is an essential database as it also carries the information of location of program files, your short-cuts, and the pointers everything is stored here in the registry. Such deletion requires specialized software.The Windows Registry can be defined as a database carrying a complete set of configuration settings which reflects the behavior of Windows.
In conclusion, we should mention that it is impossible to delete files in Windows 7 completely, without the chance of their recovering, by means of standard deleting ways. However, this method requires a user to have at least basic knowledge of cryptography technologies. Even if somebody will manage to restore them, decrypting them will be almost impossible.
After that, you can safely remove files as usual. The second method of guaranteed deletion of data is preliminary encryption of information with the consequent deleting of the encryption key. In this case, a true destruction of data occurs, instead of mere deleting a record in the file allocation table. It is based on single or multiple overwriting of the sectors that contained a given file. There are two ways of guaranteed deletion of data. You should consider this feature of modern file systems when you delete confidential information. However, even the files that seem to be deleted completely can be restored by using specialized software. To use this method, select in Explorer the desired files and folders and press Shift+Del, then confirm your choice in the dialog window. However, Windows 7 features a “direct” deletion too that actually removes objects, other than moving them to Recycle Bin. In case if you need to finally delete objects, you should clear Recycle Bin by clicking it with the right mouse button and selecting the “Empty Recycle Bin” command in the context menu. Later, a user of the computer may restore those files or folders at any time, and they will return to the locations where they were.
The main point about it that doesn’t remove objects from your hard drive, but instead moves them to Windows Recycle Bin. Note that all deleting options described above are actually one operation. This button does the same as the “Delete” command of the context menu. Those users, who prefer working with the keyboard, can delete files using the Del key.
To use it, an operator should right-click the Explorer window, choose the “Delete” command in the drop-down menu, and then confirm this action in the opened dialog. The other option is deleting via the content menu. In particular, a user can simply drag the selected files and folders and drop them to Recycle Bin on the Desktop. There are various ways to start the deletion itself, after you have selected one or multiple objects. To perform group deletion you should select objects with your mouse and Shift and Ctrl buttons. For the first option, you should simply set the cursor to the desired file or folder. To begin with, a user can remove objects one by one, or with entire groups. In Windows 7 the operation of deleting files or folders is implemented in a very smart way.